1/*********************************************************************** 2Copyright (c) 2006-2011, Skype Limited. All rights reserved. 3Redistribution and use in source and binary forms, with or without 4modification, are permitted provided that the following conditions 5are met: 6- Redistributions of source code must retain the above copyright notice, 7this list of conditions and the following disclaimer. 8- Redistributions in binary form must reproduce the above copyright 9notice, this list of conditions and the following disclaimer in the 10documentation and/or other materials provided with the distribution. 11- Neither the name of Internet Society, IETF or IETF Trust, nor the 12names of specific contributors, may be used to endorse or promote 13products derived from this software without specific prior written 14permission. 15THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25POSSIBILITY OF SUCH DAMAGE. 26***********************************************************************/ 27 28#ifndef SILK_RESAMPLER_PRIVATE_H 29#define SILK_RESAMPLER_PRIVATE_H 30 31#ifdef __cplusplus 32extern "C" { 33#endif 34 35#include "SigProc_FIX.h" 36#include "resampler_structs.h" 37#include "resampler_rom.h" 38 39/* Number of input samples to process in the inner loop */ 40#define RESAMPLER_MAX_BATCH_SIZE_MS 10 41#define RESAMPLER_MAX_FS_KHZ 48 42#define RESAMPLER_MAX_BATCH_SIZE_IN ( RESAMPLER_MAX_BATCH_SIZE_MS * RESAMPLER_MAX_FS_KHZ ) 43 44/* Description: Hybrid IIR/FIR polyphase implementation of resampling */ 45void silk_resampler_private_IIR_FIR( 46 void *SS, /* I/O Resampler state */ 47 opus_int16 out[], /* O Output signal */ 48 const opus_int16 in[], /* I Input signal */ 49 opus_int32 inLen /* I Number of input samples */ 50); 51 52/* Description: Hybrid IIR/FIR polyphase implementation of resampling */ 53void silk_resampler_private_down_FIR( 54 void *SS, /* I/O Resampler state */ 55 opus_int16 out[], /* O Output signal */ 56 const opus_int16 in[], /* I Input signal */ 57 opus_int32 inLen /* I Number of input samples */ 58); 59 60/* Upsample by a factor 2, high quality */ 61void silk_resampler_private_up2_HQ_wrapper( 62 void *SS, /* I/O Resampler state (unused) */ 63 opus_int16 *out, /* O Output signal [ 2 * len ] */ 64 const opus_int16 *in, /* I Input signal [ len ] */ 65 opus_int32 len /* I Number of input samples */ 66); 67 68/* Upsample by a factor 2, high quality */ 69void silk_resampler_private_up2_HQ( 70 opus_int32 *S, /* I/O Resampler state [ 6 ] */ 71 opus_int16 *out, /* O Output signal [ 2 * len ] */ 72 const opus_int16 *in, /* I Input signal [ len ] */ 73 opus_int32 len /* I Number of input samples */ 74); 75 76/* Second order AR filter */ 77void silk_resampler_private_AR2( 78 opus_int32 S[], /* I/O State vector [ 2 ] */ 79 opus_int32 out_Q8[], /* O Output signal */ 80 const opus_int16 in[], /* I Input signal */ 81 const opus_int16 A_Q14[], /* I AR coefficients, Q14 */ 82 opus_int32 len /* I Signal length */ 83); 84 85#ifdef __cplusplus 86} 87#endif 88#endif /* SILK_RESAMPLER_PRIVATE_H */ 89